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Balbharati solutions for Class 8 Science chapter 3 - Force and Pressure

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Chapters

Balbharati Balbharati Class 8 Science - General Science

Balbharati Class 8 Science - General Science - Shaalaa.com

Chapter 3: Force and Pressure

Exercise

Chapter 3: Force and Pressure Exercise Exercise solutions [Page 22]

Exercise | Q 1.1 | Page 22

Write the word in the blank space.

The SI unit of force is_________.

  • Dyne

  • Newton

  • Joule

Exercise | Q 1.2 | Page 22

Write the word in the blank space.

The air pressure on our body is equal to __________ pressure.

  • Atmospheric

  • sea bottom

  • space

Exercise | Q 1.3 | Page 22

Write the word in the blank space.

For a given object, the buoyant force in liquids of different ________ is__________.  (the same , density , different , area)

Exercise | Q 1.4 | Page 22

Write the word in the blank space.

The SI unit of pressure is_______.

  • N/m

  • N/m2

  • kg/m2

  • pa/m2

Exercise | Q 2 | Page 22

Make a match 

A group B group
1. Fluid a. Higher pressure
2. Blunt knife b. Atmospheric pressure
3. sharp needle c. Specific gravity
4. Relative density d. Lower pressure
5. Hecto pascal e. Same pressure in all directions
Exercise | Q 3.1 | Page 22

Answer the following question in brief.

A plastic cube is released in water.  Will it sink of come to the surface of watet?

Exercise | Q 3.2 | Page 22

Answer the following question in brief.

Why do the load carrying heavy vehicles have large number of wheels?

Exercise | Q 3.3 | Page 22

Answer the following question in brief.

How much pressure do we carry on our heads? why don't we feel it?

Exercise | Q 4.1 | Page 22

Why does it happen?

A ship dips to a larger depth in fresh water as compared to marine water.

Exercise | Q 4.2 | Page 22

Why does it happen?

Fruits can easily be cut with a sharp knife.

Exercise | Q 4.3 | Page 22

Why does it happen?

The wall of a dam is broad at its base.

Exercise | Q 4.4 | Page 22

Why does it happen?

If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.

Exercise | Q 5 | Page 22

Complete the following tables.

 Mass(Kg)  Volume (m3) Density(kg/m3)
  350       175   -
  -   190   4                    
 
Density of Metal (kg/m3)  Density of water (kg/m3)  Relative Density
      103   5
  8.5 × 103   103          -        

 

 weight(N)  Area (m2) Pressure(Nm−2)
  -     0.04   20,000
  1500   500   -     
Exercise | Q 6 | Page 22

The density of a metal is 10.8 × 103 kg/m3 . Find the relative density of the metal.

Exercise | Q 7 | Page 22

Volume of an object is 20 cm3 and the mass in 50 g. Density of water is 1 g cm-3 . Will the object float on water or sink in Water?

Exercise | Q 8 | Page 22

The volume of a plastic covered sealed box is 350 cm3 and the box has a mass 500 g. Will the box float on water or sink in water? what will be the mass of water displaced by the box?

Chapter 3: Force and Pressure

Exercise

Balbharati Balbharati Class 8 Science - General Science

Balbharati Class 8 Science - General Science - Shaalaa.com

Balbharati solutions for Class 8 Science chapter 3 - Force and Pressure

Balbharati solutions for Class 8 chapter 3 (Force and Pressure) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Balbharati Class 8 Science - General Science solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8 Science chapter 3 Force and Pressure are Contact and Non Contact Forces, Balanced and Unbalanced Forces, Pressure on Solids, Pressure on Liquid, Buoyant Force, Archemedes Principle.

Using Balbharati Class 8 solutions Force and Pressure exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board Class 8 prefer Balbharati Textbook Solutions to score more in exam.

Get the free view of chapter 3 Force and Pressure Class 8 extra questions for and can use Shaalaa.com to keep it handy for your exam preparation

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